/*
 * Copyright 2007 Yusuke Yamamoto
 * Copyright 2012 Twitter, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package twitter4j.http;

import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;

public final class StreamingGZIPInputStream extends GZIPInputStream {

	private final InputStream wrapped;

	public StreamingGZIPInputStream(final InputStream is) throws IOException {
		super(is);
		wrapped = is;
	}

	/**
	 * Overrides behavior of GZIPInputStream which assumes we have all the data
	 * available which is not true for streaming. We instead rely on the
	 * underlying stream to tell us how much data is available.
	 * <p>
	 * Programs should not count on this method to return the actual number of
	 * bytes that could be read without blocking.
	 * 
	 * @return - whatever the wrapped InputStream returns
	 * @exception IOException if an I/O error occurs.
	 */
	@Override
	public int available() throws IOException {
		return wrapped.available();
	}
}
